Low voltage ink-jet printhead
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United States of America Patent
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-
Feb 26, 1985
Grant Date -
N/A
app pub date -
Jun 30, 1982
filing date -
Jul 2, 1981
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An ink-jet printer comprises a piezoelectric element, a pressurization chamber coupled to the piezoelectric element for containing ink therein, and a nozzle communicating with the pressurization chamber, the piezoelectric element being deformable upon application of a drive voltage V to change the volume of the pressurization chamber for ejecting ink from the nozzle. The vibratory system including the piezoelectric element has an acoustic capacitance Co selected with respect to the flow passage system including said nozzle, said pressurization chamber and an ink supply passage, so as to minimize the drive voltage V. Drive voltage is related to the capacitance Co, electrical capacitance cp of the piezoelectric element and pressure .psi. as follows: ##EQU1## K is a constant.
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